What it is
Acrylates/Ammonium Methacrylate Copolymer is a synthetic polymer of acrylate esters and an ammonium methacrylate monomer. It is used primarily as a film former and rheology modifier, helping a product spread and set into a uniform layer. It appears in sunscreens and other emulsions where an even, durable film is desirable.
Safety & warnings
This is a large polymer that stays on the skin surface rather than penetrating, and it is generally well tolerated with low irritation potential at typical use levels. It is not considered comedogenic.
Origin & sourcing
Synthetic; produced by copolymerizing acrylate and ammonium methacrylate monomers.
Questions everyone asks
What is the main role of this ingredient?
It forms a film and helps control viscosity so the product wears evenly on the skin.
Is it found mainly in mineral sunscreens?
It can appear in many emulsion types; its function is film forming and texture, not UV protection.